I booked mine! 21st night Air Asia. Back 29th evening. Right now I'm looking at all the day tours I can indulge in while I'm there to alleviate the pain from the Incubus concert withdrawal symptoms :) Concert I bought Arena Free Standing.
Just got my go ahead from parents! Bought the concert ticket today! I'm from Delhi myself. I plan to leave 21st/22nd, let's see. I have a friend in KL so will be crashing there. So far I have figured out the visa procedure and ticket stuff. I'm confused too about how many days to spend there considering I want to make it a concert+long overdue vacation. Will probably book my tickets tomorrow and visa thereafter.
I have to thank you though. I have no clue why I did not consider traveling till I saw your post here!